Key-locking escutcheon



P. R. MOFFITT.

KEY LOCKING ESCUTCHEON.

APPLICATION FILED MAY 31, 1921.

Patented Jan. 31, 1922.

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INVENTOR. W ORNEY.

* warren stares Par-am; orricag PER-CY B. MorriTT, or rnw'rnoknr, aHonEISLAND.

KEY-LOCKING Application filed May 31,

To aZZ whom it may concern:

Be it known that l, PERCY R. Morrrr'r, a

citizen of the United States, residing at Pa tucket, in the county ofProvidence and State of Rhode Island, have invented new and use-' fulImprovements in a Key-Locking Es: cutcheon, of which the following is aspecificat1on. This invention relates to certain new and usefulimprovements in a key lockingx escutcheon, and it has for its primaryobject to provide an escutcheon embodying means for preventing therotation or turning of the key after having beendisposed within the lockand actuated to render the latter operative. I

The invention further resides in an improved escutcheon having means forpreventing the withdrawal of the key as well as preventing .rotation ofthe key to function properly.

In the drawing,

Figure l is a vertical section through the improved escutcheon depictingthe key-locking device in its operative position and showing the doorand its lock by dotted lines;

. Figure 2 is a front elevation thereof taken about on line 2-2 ofFigure 1;

Figure 3 is a perspective view of the escutcheon per se; and

Figure 4 is a similar view of the slide element.

Referring more in detail tothe drawing, the numeral 1 indicates the doorhaving thev usual lock 2 and key openings 3 leading through the wood onopposite sides thereof to the out-side escutcheon 4 and the insideescutcheon, the latter constituting and embodying the subject matter ofthe present invention. V

The improved escutcheon consists of a plate 5 having the key opening 6and a transversely intersecting groove 7 of dovetailed section, thelatter being designed to receive the slide 8 of corresponding crosssection.

- The slide is provided intermediate its ends with a screw threadedaperture 9 to receive a locking screw 10, the same having a knurledouter end and a smooth. tapering inner end 11.

In operation, the key 12 is inserted through the escutcheon plate 5 intothe lock '2 and then turned to throw the lock bolt to secure the door.The key is then turned sufnsouroi-rnoiv.

. Specification of Letters Patent. 'PQEQ M d an, 31 1922,

1921. Serial No. 473,852.

ficientlyto be engaged by the locking screw and be held against turningin such direction as to unlook the door, i. e. the key is rotated forone complete turn to throw the bolt of firmly against unauthorizedactuation but also prevent dislodgment of the same 'by some one from theoutsidethe slide performing this latter function. The. device is simplein construction and can be expeditiously manufactured at but little costso that it can replace the ordinary escutcheon with but 1 slightlyadditional expense. The opening 3 betweenv the plate 5 and the lock 2provides I a chamber into which the screw is withdrawn when it isdesired to actuate the key under normal conditions. It is thereforeunnecessary to remove the slide except to remove the key when'the screwis first displaced and the slide moved lengthwise from the groove.Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1 1 An escutcheon comp-rising a plate havinga key opening therethrough and an intersection dovetailed grooveextending across the plate, a slide mounted in the groove and formedwith a threaded opening intermedi-' ate its ends, and a locking screwthreaded in the slide opening and having a knurled outer end and atapered smooth inner end for movement into the path of the bolt-throwingpart of a key.

. 2. An escutcheon comprising a plate havinga key opening therethroughand an intersecting dovetailed groove, a slide mounted in the groove andformed with an aperture intermediate its length, and a locking screwthreaded through the slide aperture and formed on its inner end with asmooth tapered point. 7

3. An escutcheon comprising a plate having a key opening therethroughand an interof a key. tWo subscribing Witnesses.

4. An escutcheon comprising a plate hav PERCY R. MOFFITT. ing av keyopening, a support secured across Witnesses: the opening, and a screwthreaded through M. A. l'ilrrresnrnr seating groove, a slide mounted inthe groove, opening of the plate for engagement with a 10 and a lockingscrew threaded through the key.

slide and passed through the plate opening In testimony whereof I havesigned my for engagement With the bolt-throwing pert name to thisspecification in the presence of said support and extending through thekey' J. A. MILLER.

